o'donoghue : nudibranchiate mollusca. 139 



the " rich violet purple " colour, " orange red branchiae," i.e. 

 cerata, and the " orange red " rhinophores. The following year 

 (6, p. 60) he again treated of this species, and referred it definitely 

 to Phidiana iodinea. 



Bergli in 1873 (1, p. 615) also dealt with it as Phidiana iodinea, 

 calling attention to the slight and meagre description furnished by 

 Cooper. Again, in 1879 (2, pp. 79-80), when he was able to examine 

 an actual specimen, he referred it to the genus Flabellina, Cuvier, 

 again noting the " violet purple " body colour, " orange 

 thinophores," and " orange red " cerata. He also gave a 

 description of the radula and drawings of the teeth. 



In 1901 Cockerell (3, p. 121) also described the same species, 

 remarking on the body colour as " brilliant purple " and the 

 rhinophores and papillae he describes as " pale salmon colour ". 

 The description he gives of the teeth agrees closely with that of 

 Bergh, whose paper, however, he does not mention, and he concludes 

 that it belongs to the genus Coryphella, Gray. 



There are several points of difference between these two genera, 

 the most obvious being — 



Coryphella. Flabellina. 



Rhinophores generally smooth. Rhinophores perfoliate. 

 Anterior corners of foot Anterior corners of foot pro- 



angulated or rather produced. duced into tentacles. 



Penis unarmed. Penis armed with a style. 



In all these points the specimen agrees with Flabellina, according 

 to Bergh's account, and even Cockerell speaks of the tentacles 

 of the foot, so that there seems little doubt that it really belongs to 

 this genus. 



The classification and synonymy of this form is, therefore :— 



Genus Flabellina, Cuvier, 1830. 

 Species Flabellina iodinea. Cooper, 1862. 



Synonymy : .FJolis {Phidiana ?) iodinea. Cooper, 1862. 

 Phidiana iodinea. Cooper, 1863. 

 Bergh, 1873. 

 Flabellina iodinea, Bergh, 1879. 

 Coryphella iodinea, Cockerell, 1901. 



B. On Thecacera velox, Cockerell. 



In Cockerell's paper in 1901 (3, p. 87) he also describes a new species 

 of Nudibranch from La Jolla, under the name Thecacera velox, 

 but he gives no references to other literature, merely remarking that 

 it is very similar to T. pennigera. He again refers to the species 

 in 1908 (4, p. 106). 



The genus Thecacera was established in 1828 by Fleming (8, 

 p. 283) for a species described by Montagu in 1807 (9, p. 17) as 



